Problem.
The opposite of a problem (challenge, difficulty) could be a solution, answer, or fix.The opposite of the adjective problem could be easy, facile, or effortless.
A precipitate is a solid in a solution. The precipitate will not dissolve in the solution, it is insoluble!! The opposite of a precipitate is a solute.
The opposite of a scientific solution would be an unscientific or pseudoscientific solution. This refers to methods or explanations that lack empirical evidence, scientific support, or do not adhere to the principles of the scientific method.
The opposite could be solution, agreement, amity, comity, accord, or peace.
Deionization is the process of removing ions from a solution, making it the opposite of ionization which adds or creates ions in a solution.
The opposite of a problem (challenge, difficulty) could be a solution, answer, or fix.The opposite of the adjective problem could be easy, facile, or effortless.
Opposite of mysterious>obvious, open, apparent, evident.
Problem or in scientific means: insoluble or a suspension.
Flipside is an alternate solution. Flopside is the opposite of flipside.
The Latin root dis- means not. You should know what solution means :) So dissolution means the opposite of solution.
The opposite of pH is pOH. While pH measures the acidity of a solution, pOH measures the alkalinity or basic nature of a solution. The sum of pH and pOH in a solution at a given temperature is always equal to 14 at 25°C.
The opposite of filtrate is to concentrate, where the goal is to increase the solute content in a solution by removing solvent.